Question: What kinds of airplanes do American Airlines operate?
Paraphrase: What sorts of airplanes do American Carriers operate?
SPARQL (Wikidata):  select distinct ?obj where { wd:Q32396 wdt:P121 ?obj . ?obj wdt:P31 wd:Q15056993 } 
Answer: Lockheed L-049 Constellation, Douglas DC-2, DC-3, McDonnell Douglas MD-80 family, McDonnell Douglas DC-10, Convair 990 Coronado, Douglas DC-6, BAe 146, DC-4, Ford Trimotor, Douglas DC-7, Lockheed L-188 Electra, Convair CV-240 family, T-32 Condor II, Airbus A321, Boeing 737, Boeing 707, Boeing 717, Boeing 727, Boeing 757, Boeing 777, Boeing 787 Dreamliner, Airbus A300, A320neo family, BAC One-Eleven, McDonnell Douglas MD-11